bMeet the people who design the algorithms that capture our musical tastes. b p The people who make music recommender systems have lofty goals they want to broaden listeners' horizons and help obscure musicians find audiences, taking advantage of the enormous catalogs offered by companies like Spotify, Apple Music, and Pandora. But for their critics, recommender systems seem to embody all the potential harms of algorithms they flatten culture into numbers, they normalize ever-broadening data collection, and they profile their users for commercial ends. Drawing on years of ethnographic fieldwork, anthropologist Nick Seaver describes how the makers of music recommendation navigate these tensions how product managers understand their relationship with the users they want to help and to capture how scientists conceive of listening itself as a kind of data processing and how engineers imagine the geography of the world of music as a space they care for and control. piComputing Tastei rehuma